Here’s How NASA Spotted Thousands Of Near-Earth Asteroids

A NASA mission called NEOWISE will soon be coming to an end, but it leaves behind a legacy of 10 years of data observing the sky — during which time it spotted thousands of near-Earth asteroids. The spacecraft, called the Near-Earth Object Wide-field Infrared Survey Explorer, has been orbiting the Earth since its launch in 2009, but it only began asteroid hunting in 2014. In the last decade it has made 1.45 million infrared measurements of more than 44,000

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